<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>管理权限</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 添加按钮展示 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加用户</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表展示 -->
      <el-table :data="rolesList" border stripe>
        <!--展开列 -->
        <el-table-column type="expand">
          <template v-slot="scope">
            <!-- 一级权限 -->
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <el-col :span="5">
                <el-tag>
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二，三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限  -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag type="success">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRolesList(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 操作 -->
        <el-table-column label="#" type="index"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleName" label="角色描述"> </el-table-column>
        <el-table-column prop="roleDesc" label="操作">
          <template width="200px" v-slot="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRoles(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 属性结构弹出框 -->
    <el-dialog title="分配权限" :visible.sync="setRoles" width="30%">
      <!--<span>这是一段信息</span>-->
      <el-tree
        :data="allotRoles"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="last"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="showSetRoles = false">取 消</el-button>
        <el-button type="primary" @click="showSetRoles">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      setRoles: false,
      allotRoles: [],
      treeProps: {
        label: "authName",
        children: "children",
      },
      //子节点
      last: [],
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("/roles");
      if (res.meta.status !== 200) return this.$message.error("获取失败!");
      this.rolesList = res.data;
    },
    async removeRolesList(role, rightId) {
      const result = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err); //点击删除之后的报错
      //console.log(result);
      if (result !== confirm) this.$message.info("取消删除");
      //当发送delete请求之后，返回的数据就是最新的角色权限信息
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("失败!");
      }
      role.children = res.data;
    },
    async showSetRoles(role) {
      this.roleId = role.id;
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status != 200) this.$message.error("失败!");
      this.$message.success("成功!");
      this.allotRoles = res.data;
      //console.log(res);
      this.setRoles = true;
      //对属性结构进行递归进行传值
      this.lastSection(role, this.last);
    },
    //子节点的添加
    lastSection(node, arr) {
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => {
        return this.lastSection(item, arr);
      });
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>